Input device and its manufacturing method

Abstract

The integrated structure of the stress sensor section with the control section facilitates the confirmatin of the matching of both sections before the input device is incorporated into an electronic device. For example, it is possible to select only the input device which exhibits favorable matching as a result of the confirmation and to incorporate it in the electronic device. Therefore, with the above-described structure of the present invention, and input device that enables constantly favorable matching of both the stress section and the control section can be provided.

1 . An input device comprising: a sensor section board including a stress sensor section that generates a change in a characteristic value of a strain gauge due to stress application to a post; and a control section board substantially consisting of a control section, that converts the change in the characteristic value into data on a direction and intensity of the stress, wherein the sensor section board is mounted on the control section board.  
   
   
       2 . An input device according to  claim 1 , wherein the stress sensor section has resistance elements as the strain gauge that are arranged at four places on two orthogonal lines whose intersection is positioned at a center of a sensor effective region on a face of the board and which extend along the face of the board, the four places being substantially equally distant from the intersection, has a post that is fixed to or integrated with the board in such a manner that the center of the sensor effective region on the face of the board and a center of a bottom face of the post substantially coincide with each other, and generates change in resistance values by expansion/contraction or compression/compression release of the resistance elements due to stress application to the post.  
   
   
       3 . An input device according to  claim 2 , wherein the board forming the stress sensor section is composed of a deforming portion and a nondeforming portion, and the strain gauge (including the resistance elements) and the post are disposed in the deforming portion and no component of the control section is disposed in the deforming portion.  
   
   
       4 . An input device according to  claim 3 , wherein the board forming the stress sensor section and the board forming the control section are integrated by two integrating means or more.  
   
   
       5 . An input device according to  claim 4 , wherein the integration of the board forming the stress sensor section and the board forming the control section includes a fixing means using solder, adhesive, a screw, or a bolt and nut.  
   
   
       6 . An input device according to  claim 5 , wherein a connecting member used for integrating the board forming the stress sensor section and the board forming the control section includes solder, and the solder also contributes to electrical connection between the stress sensor section and the control section.